Sarah Harding and Chad Johnson turned up the heat on Celebrity Big Brother last week, when they were seen locking lips in a steamy smooch.

And Kerry Katona displayed her sense of humour on Monday, when she decided to recreate the clinch in the house with Rylan Clark-Neal as they shot a promo for his show Big Brother's Bit On The Side.

In the brief clip, the giggling Atomic Kitten singer is seen leading Rylan into the Big Brother house's kitchen as he repeatedly asks: 'Why are you coming in here?'

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Lip service: Kerry Katona and Rylan Clark-Neal playfully shared a passionate smooch while filming a promo for Monday night's episode of Big Brother's Bit On The Side

Wearing a form-fitting black dress and towering heels, she then grabs erstwhile X Factor contestant by the back of his head for a playful smooch - before feigning shock at the cameras placed behind them.

Shock, horror: Kerry was seen feigning shock as she turned to see the cameras behind her

Having a laugh: The former Atomic Kitten star then shared a mischievous laugh after the kiss

And now coming to regret her steamy antics with him on camera, former Girls Aloud star Sarah has insisted that the duo need to 'tone' down their romance, as she doesn't want to hurt her boyfriend on the outside.

The 35-year-old singer admitted she had been dating another man on the outside for four weeks and claimed on Sunday night's episode of the show, saying: 'There's going to be some pretty bad consequences.'

Sarah told Chad that she believes the pair should 'tone down' their relationship, as she is worried about how they will be perceived by the public, given that she is in a relationship on the outside.

Follow me: At the beginning of the brief promo, Kerry was seen leading Rylan into the kitchen

Oops: Rylan then appeared to be heave as he asked singer Kerry what she'd been eating

Recalling their steamy smooch in the kitchen on Friday night, she told The Bachelor star: 'We got busted big time. We care about each other and we're best friends in the house, but I just want to draw a line under it.

'I just feel terrible that I let my emotions get the better of me... I don't want to make a fool out of anybody. You're single and I've only been dating for four weeks, but I don't want to hurt someone who is a good person - they don't deserve to be hurt.'

Sarah added: 'I need to respect other people on the outside and take responsibility for my actions.'

Regretting her actions? Sarah Harding, 35, was seen admitting to dating her secret beau for four weeks while speaking with her in-house fling Chad Johnson on Sunday night's CBB

Mindful: Sarah admitted she was worried about how the duo will now be perceived and insisted she didn't want anybody to get hurt because of her flirty actions in the house

Taking in what Sarah had to say, Chad played down their kiss and claimed the duo had 'got carried away' with one another, although he did admit in the diary room that he wasn't happy about the blonde beauty taking a step back from him.

'You can tell she's pulled back and I have to do the same,' he explained. 'I'm not happy about it. She says we got caught up in the emotions, but I didn't get caught up, I knew I liked her.'

Earlier in the episode, Chad was seen hinting at his kiss with Sarah to Sam Thompson and Jordan Davies who had suspected that the pair had got intimate.

Talk quickly turned to Sarah's situation outside of the house, with Paul Danan warning Chad to be 'respectful' of the starlet's beau.

'We got caught up in the moment': Taking in what Sarah had to say, Chad played down their kiss and claimed the duo had 'got carried away' with one another

'I'm not happy': Chad, meanwhile, admitted he wasn't pleased about Sarah taking a step back from him, but claimed he understood her situation on the outside

Chad, despite having already locked lips with Sarah, reassured him: 'I never hit on other guy's girls. I'm not that type of dude.

His snog with Sarah appeared to be talk of the house, with Made In Chelsea's Sam winding up Sarah and prying it out of her that she had kissed her housemate, despite her initial denial.

She claimed it had been a 'one-off' and she wouldn't be puckering up to Chad again 'under any circumstances', but that didn't stop Sam and Jordan Davies teasing Chad and asking to know what Sarah's tongue was like.

Left irked by their teasing, Sarah shot back: 'Oi, can you stop? Chad don't cave to them.'

Frustrated: He said: 'She says we got caught up in the emotions, but I didn't get caught up, I knew I liked her'

Teasing: Sam Thompson couldn't resist winding Sarah up over her kiss with Chad, after prying out of the blonde beauty that the duo had locked lips

'They're funny little p***ks, but they're little p***ks,' she told her co-stars. 'I said I wanted to see how things are when I get out and assess everything. I'm shaking.'

Unfazed by her reaction, Sam continued to get at Sarah and insisted that Rylan Clark-Neal would be having a field day on CBB's Bit On The Side over her smooch, while suggesting that her secret beau will appear as a guest on the show.

'If I ever get in trouble with a missus, I'm going to be like well if Sarah Harding did it...' Sam joked, prompting Sarah to say: 'Stop man, that's not how I roll.'

Viewers later saw her lamenting to Chad about her tricky situation, insisting again that she doesn't want to hurt anybody.

Oops: He then continued to rattle Sarah by claiming her secret boyfriend will appear on CBB's Bit On The Side with Rylan as a result of her steamy smooch

Chad, however, pointed out that Sarah will end up hurting someone, as he likes her, and told the singer that she now has to choose.

'I need to get back into the real world, I can't assess anything while my head is in here,' Sarah told him. 'In the real world you're going to be in LA anyway and this is my real life and I've probably just thrown something... I don't know what I'm doing man.'

Chad cheekily asked if that meant he has now been 'friend-zoned', with Sarah telling him: 'You don't live here and you don't have consequences, I have.'

Celebrity Big Brother airs nightly on Channel 5.

Cooling things off: Sarah told Chad she wanted to talk to him once they were both on the outside of the house, prompting him to cheekily ask if that meant he had been 'friend-zoned'